WO2002060075A3 - Enhanced conversion of wideband signals to narrowband signals - Google Patents

Enhanced conversion of wideband signals to narrowband signals Download PDF

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Publication number
WO2002060075A3
WO2002060075A3 PCT/US2002/001901 US0201901W WO02060075A3 WO 2002060075 A3 WO2002060075 A3 WO 2002060075A3 US 0201901 W US0201901 W US 0201901W WO 02060075 A3 WO02060075 A3 WO 02060075A3
Authority
WO
WIPO (PCT)
Prior art keywords
narrowband
wideband
signal
signals
speech
Prior art date
Application number
PCT/US2002/001901
Other languages
French (fr)
Other versions
WO2002060075A2 (en
Inventor
Khaled H El-Maleh
Arasanipala Ananthapadmanabhan
Andrew P Dejaco
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25092052&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2002060075(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to JP2002560291A priority Critical patent/JP4330879B2/en
Priority to KR1020037009723A priority patent/KR100856684B1/en
Priority to EP02705910.4A priority patent/EP1354416B1/en
Priority to BRPI0206664A priority patent/BRPI0206664B1/en
Priority to ES02705910T priority patent/ES2408220T3/en
Priority to BR0206664-5A priority patent/BR0206664A/en
Priority to AU2002240028A priority patent/AU2002240028A1/en
Publication of WO2002060075A2 publication Critical patent/WO2002060075A2/en
Publication of WO2002060075A3 publication Critical patent/WO2002060075A3/en
Priority to HK04105225A priority patent/HK1062348A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

Wideband speech signal must be converted to narrowband speech signals if the transmission medium or the destination termianl is constructed with narrowband constraints. A typical wideband-to-narrowband conversion method is the elimination of frequencies above 3400 Hz using a low pass filter and a down sampler. Howerver, this method producesa muffled speech sound since the resulting narrowband signal has a flat frequency response. Methods and apparatus are presented herein to enhance the acoustinc quality of a wideband-to-narrowband converted signal. A bandwidth switching filter (68) is used to emphasize a mid-range frequency portion of the wideband signal to that the resulting narrowband signal has a non-falt frequency spectrum.
PCT/US2002/001901 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals WO2002060075A2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2002560291A JP4330879B2 (en) 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals
KR1020037009723A KR100856684B1 (en) 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals
EP02705910.4A EP1354416B1 (en) 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals
BRPI0206664A BRPI0206664B1 (en) 2001-01-24 2002-01-23 improved conversion of broadband signals to narrowband signals
ES02705910T ES2408220T3 (en) 2001-01-24 2002-01-23 Improved conversion of broadband signals to narrowband signals
BR0206664-5A BR0206664A (en) 2001-01-24 2002-01-23 Enhanced conversion of broadband signals to narrowband signals
AU2002240028A AU2002240028A1 (en) 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals
HK04105225A HK1062348A1 (en) 2001-01-24 2004-07-16 Apparatus and method for enhanced conversion of wideband signals to narrowband signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/771,508 US7113522B2 (en) 2001-01-24 2001-01-24 Enhanced conversion of wideband signals to narrowband signals
US09/771,508 2001-01-24

Publications (2)

Publication Number Publication Date
WO2002060075A2 WO2002060075A2 (en) 2002-08-01
WO2002060075A3 true WO2002060075A3 (en) 2002-10-31

Family

ID=25092052

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/001901 WO2002060075A2 (en) 2001-01-24 2002-01-23 Enhanced conversion of wideband signals to narrowband signals

Country Status (11)

Country Link
US (3) US7113522B2 (en)
EP (1) EP1354416B1 (en)
JP (3) JP4330879B2 (en)
KR (1) KR100856684B1 (en)
CN (1) CN1292401C (en)
AU (1) AU2002240028A1 (en)
BR (2) BRPI0206664B1 (en)
ES (1) ES2408220T3 (en)
HK (1) HK1062348A1 (en)
TW (1) TW527790B (en)
WO (1) WO2002060075A2 (en)

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CN105378831B (en) 2013-06-21 2019-05-31 弗朗霍夫应用科学研究促进协会 For the device and method of improvement signal fadeout of the suitching type audio coding system in error concealment procedure
US10045135B2 (en) 2013-10-24 2018-08-07 Staton Techiya, Llc Method and device for recognition and arbitration of an input connection
US10043534B2 (en) 2013-12-23 2018-08-07 Staton Techiya, Llc Method and device for spectral expansion for an audio signal
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Also Published As

Publication number Publication date
JP5199147B2 (en) 2013-05-15
CN1292401C (en) 2006-12-27
US7113522B2 (en) 2006-09-26
JP4330879B2 (en) 2009-09-16
US7577563B2 (en) 2009-08-18
JP5129201B2 (en) 2013-01-30
EP1354416B1 (en) 2013-04-24
US20030012221A1 (en) 2003-01-16
JP2004524560A (en) 2004-08-12
WO2002060075A2 (en) 2002-08-01
ES2408220T3 (en) 2013-06-19
US20070162279A1 (en) 2007-07-12
TW527790B (en) 2003-04-11
KR20030072603A (en) 2003-09-15
JP2010016828A (en) 2010-01-21
JP2009187012A (en) 2009-08-20
KR100856684B1 (en) 2008-09-04
HK1062348A1 (en) 2004-10-29
CN1488137A (en) 2004-04-07
BR0206664A (en) 2004-12-28
US20090281796A1 (en) 2009-11-12
AU2002240028A1 (en) 2002-08-06
US8358617B2 (en) 2013-01-22
BRPI0206664B1 (en) 2018-09-25
EP1354416A2 (en) 2003-10-22

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